docs: def write_pdf(pdf_obj, destination):
      """
      Write PDF object to file
      :param pdf_obj: PDF object to be written to file
      :param destination: Desintation path
      """
      reader = PdfFileReader(pdf_obj)  # Create new PDF object
      writer = PdfFileWriter()
  
      page_count = reader.getNumPages()
  
      # add the "watermark" (which is the new pdf) on the existing page
      for page_number in range(page_count):
          page = reader.getPage(page_number)
          writer.addPage(page)
  
      # finally, write "output" to a real file
      with open(destination, "wb") as outputStream:
          writer.write(outputStream)